After several years planning the difficult mission, scientists successfully drilled through Antarctica’s Pine Island Glacier. They were stunned by what they found, and worry global sea levels could be at risk. Remote Antarctic Trek Reveals A Glacier Melting From Below : NPR

The military said the regular patrols are meant to protect the thousands of miles of coastline suddenly open to other countries’ ships on a regular basis. Russia Preparing Patrols of Arctic Shipping Lanes